Mardjan, Mardjan, Yayi Prabandari, Mohammad Hakimi, and Carla Marchira. “Emotional Freedom Techniques for Reducing Anxiety and Cortisol Level in Pregnant Adolescent Primiparous”. Unnes Journal of Public Health 7, no. 1 (January 31, 2018): 1-6. Accessed April 10, 2020. https://journal.unnes.ac.id/sju/index.php/ujph/article/view/19212.